Abstract: A system and method for separating and combining three spectrums of light has a polarizing beamsplitter, an input retarder or polarizer located adjacent a first side of the polarizing beamsplitter, a spacer that can also be a splitter located adjacent a second side of the polarizing beamsplitter and a dichroic beamsplitter located adjacent a third side of the polarizing beamsplitter.

Abstract: A method and apparatus or configuration generates light of a given polarization state (P). A polarization state-sensitive beam splitter is acted upon by light (L) at an input (E1), light (LP) of the given polarization state being output by the beam splitter (1) at a first beam splitter output (A1). Light (LS) with polarization state (S) that is perpendicular to the given state (P) is changed with respect to this state and also output. The light of the changed polarization state again acts upon the polarization state-sensitive beam splitter at the input (E1). The apparatus or configuration achieves this by having the optic input (E3) of a polarization state-changing structural element whose optic output (A3) is operationally connected to the optic input (E1) of the polarization state-sensitive beam splitter, operationally connected to the second optic output (A2).

Abstract: A projector arrangement has a light-splitting and recombining device that divides white light into red, green and blue light output at respective surfaces, and recombines red, green and blue light input to these respective. A transparent base body of the arrangement contains a layer of a material with lower refractive index and at least one layer of a material with higher refractive index. The lower refractive index is selected so that 1.7≦NLS≦2.1 and the refractive index of the transparent base body is selected so that 1.52≧NK≧1.

Abstract: Method for manufacturing a selective light splitter and recombining device that divides white light into red, green and blue light and recombines red, green and blue light independently of polarization, provides two coating systems, each reflecting and transmitting color-selectivity. A transparent base body is embedded in or is on the coating systems and at least one of the coating systems has a layer of a material with lower refractive index and at least one of a material with higher refractive index. The lower refractive index is selected so that 1.7≦NLS≦2.1 and the refractive index of the transparent base body is selected so that 1.52≧NK≧1. The method also includes determining an emergent face for the red, green and blue light, and tilting one emergent face such that it forms an angle p deviating from zero by more than is caused by fabrication tolerances for which &phgr;≦5°.

Abstract: Method for manufacturing a selective light splitter and recombining device that divides white light into red, green and blue light and recombines red, green and blue light independently of polarization, provides two coating systems, each reflecting and transmitting color-selectivity. A transparent base body is embedded in or is on the coating systems and at least one of the coating systems has a layer of a material with lower refractive index and at least one of a material with higher refractive index. The lower refractive index is selected so that 1.7≦NLS≦2.1 and the refractive index of the transparent base body is selected so that 1.52≧NK≧1. The method also includes determining an emergent face for the red, green and blue light, and tilting one emergent face such that it forms an angle &phgr; deviating from zero by more than is caused by fabrication tolerances for which &phgr;≦5°.

Abstract: A waveguide plate and a process for making the waveguide plate with a plate-like glass substrate (1), carrying a waveguiding layer (2), with at least one coupling grating on the surface carrying said waveguiding layer (2), which coupling grating is formed as a grating of lines with a period between 150 nm and 1000 nm, the extension of said grating being at least 5 cm with lines parallel to one another, wherein the coupling angle () varies by not more than 0.1_/cm along a line of said grating and wherein the absolute value of the deviation of the coupling angle () on said waveguide plate, from a predefined desired value, does not exceed 0.5_. The deviation from the average value of the coupling angle does not exceed 0.3_, preferably not 0.15_ on the whole waveguide plate.

Abstract: A configuration of prisms is capable of spectral division, or spectral color combination, or both simultaneously even with reflected light that undergoes a change of polarization. The configuration includes first and second prisms each with pairs of faces that respectively form first and second prism angles. One face of one prism is engaged against one face of the other prism with no air gap between. Light of a first spectral range is incidence substantially perpendicular on the other prism face of the first prism after entering the first prism and undergoing a double reflection before leaving the first prism. Light of a second and third spectral range are also incident on the other face of the first prism and pass substantially unreflected through the first prism. Light of the second spectral range after leaving the first prism and entering the second prism is double reflected in the second prism. Light of the third spectral range substantially passes through the second prism as well without reflection.

Abstract: A spectrally selective light splitter divides white light into red, green and blue light or recombines white light from red, green and blue light using two separate coating systems. Each system reflects and transmits color selectively, and are applied or embedded on or in at least one transparent base body, with at least one of the coating systems is made up of at least one layer of a material with lower refractive index as well as at least one layer of a material with higher refractive index. For the lower refractive index NLS: 1.7≦NLS≦2.1 and the reflective index Nk of at least the transparent base body on which the system is applied follows the rule: 1.52≧Nk≧1.